Yes it’s coralline algae. Welcome to the forum, no we don’t judge here. The only bad question is the one you don’t ask. You can do it we can help, that’s how it works around here. Now tell us about your tank and share the addiction.
My tanks not much to talk about yet. It’s only a few months old. 20L, aquaclear70, ai prime HD, jebao wave makers, Zoas, gsp, YWG and a royal gamma. I have the Red Sea ammonia, nitrite and nitrate tests. Which test kits should I pick up next? I was thinking the alk hanna checker.